摘要
用偏光显微镜研究了环氧树脂 (EP) 液晶化合物固化体系在固化过程中 ,不同温度、不同反应时间、不同的液晶聚合物加入量下体系的形态变化 ,用力学方法和差热分析仪 (DSC)测试了不同液晶聚合物加入量下固化物的力学性能和玻璃化转变温度 (Tg)。结果表明 :起始固化温度、固化时间、共混方式都对固化体系中液晶的有序结构有较大影响 ,加入不同含量的液晶聚合物 ,均可以使固化物的冲击强度、拉伸强度、弯曲强度、模量和Tg提高 ,其中冲击强度最大提高 3 5倍 ,拉伸强度提高 1 6倍 ,弯曲强度提高 1 2 6倍 ,弯曲模量提高 1 1倍 ,Tg提高
Effect of different curing time,curing temperatures,liquid crystalline compound content and mixing methods of liquid crystalline compounds on morphology of epoxy resin/liquid crystalline compounds curing system were studied by polarizaing optical microscope (POM).The mechanical properties and Tg were determind by mechanical test methods and differential scanning calorimetry(DSC).The results showed that the morphology of epoxy resin/liquid crystalline compound curing system were greatly influenced by the starting curing temperatures,curing time,mixing methods and the content of liquid crystalline compounds,impact strength was enhanced to 3.5 times,tensile strength was enhanced to 1.6 times,bending modulus was improved for 1.1 times,bending strength was improved for 1.26 times,glass transition temperature (Tg) was increased to 60℃ for the modified system.
出处
《材料科学与工程》
CSCD
北大核心
2001年第4期56-61,65,共7页
Materials Science and Engineering
基金
湖南省教委资助项目 ( 99C10 9)
